10 second questions

Jai Ganesh · 2007-12-22 18:16:03

Correct again, JohnnyReinB!!!

Both the answers are correct. Keep it up!!!

#406. A man received 10% increase in his salary. His new salary is #2926. What was his salra before the hike?

#407. A bicycle was sold for $1980 at a gain of 10%. What is the cost price of the bicycle?

JohnnyReinB · 2007-12-22 18:20:05

Jai Ganesh · 2007-12-22 18:37:34

Good work, JohnnyReinB!
Both your answers are correct!!!

#408. What is the value of MDCCCLXXXVIII?

#409. What is the sum of plane angles at a point (in radians)?

JohnnyReinB · 2007-12-22 18:48:55

Jai Ganesh · 2007-12-22 18:52:01

Correct, JohnnyReinB!

#410. Find x if 9, x, x, 49 are in proportion.

#411. Find x, if 48, 36, x are in proportion.

#412. An electric pole casts a shadow of length 20 meters at a time when a tree 6 metres high casts a shadow of length 8 meters. Find the height of the pole.

JohnnyReinB · 2007-12-22 18:54:24

Jai Ganesh · 2007-12-22 18:59:33

Correct, JohnnyReinB!
Your answer to #412 is correct!!!

#413. If 36 men can do a piece of work in 20 days, in how many days will 15 men complete the same work?

#414. If 36 men can complete a work in 24 days, how many extra men have to be employed so as to complete the work in 18 days?

JohnnyReinB · 2007-12-22 19:04:16

Jai Ganesh · 2007-12-22 19:07:12

Very well done, JohnnyReinB! Both the answers you posted are correct!!!

#415. Is x³ + 7x² + 16x + 12 divisible by (x+3)?

#416. What is the remainder when (2a³ + a² - 5a +3) is divided by (a-3)?

Jai Ganesh · 2007-12-22 19:11:49

#417. Simplify:-

418. Simplify:-

JohnnyReinB · 2007-12-22 19:29:15

Jai Ganesh · 2007-12-22 21:12:12

JohnnyReinB,
Solution to #418 is correct.
#417 :- Try again.

#419. Find the compound interest for $5000 for 2 years at the rate of 8% per annum when interet is compounded annually.

#420. In how many years will $5000 amount to $6655 at 10% compound interest compounded annually?

#421. A sum becomes 216/125 times of itself in 3 years compounded annually. Find the rate of interest charged.

#422. During festival season, a saree is sold for $3250 after allowing discount of 35%. What is the marked price?

#423. Is 2p²-9p-18 divisible by (p-6)?

#424.The area of a rectangle is a²+4a-21. Find the width of the rectangle if the length is (a+7).

#425. What is the remainder when

is divided by (x+1)?

#426. A train travels (2x²+13x+15)kilometers in (x+5)hours. What is the average speed of the train?

mathsyperson · 2007-12-22 22:09:04

Jai Ganesh · 2007-12-23 17:31:04

Solution to #426.
Bull's eye, mathsyperson!
Congratulations!!!

#427. Solve

#428. Solve

#429. Solve

#430. Solve

JohnnyReinB · 2007-12-23 20:19:24

Jai Ganesh · 2007-12-23 22:48:55

Both correct!!!
Well done, JohnnyReinB!!!

Jai Ganesh · 2007-12-23 22:57:54

#431. A cubical box of volume 2197 cubic cm is put in a big cubical box of side 39 cm. How many such boxes can be put in the big box?

#432. Find the smallest number by which 3456 must be multiplied so that it becomes a perfect cube.

#433. The sides of a cube are doubled. Find the ratio of the volumes between the first cube and the new cube.

JohnnyReinB · 2007-12-23 23:04:49

Jai Ganesh · 2007-12-24 00:55:26

No, JohnnyReinB! You are wrong this time!!!

#434. Find the value of 704²-296².

#435. Find the value of

#436. Find the value of the following expression when x=2 and
y=-3.
9x²+16y²+24xy.

#437. If

, find the value of

Last edited by Jai Ganesh (2007-12-24 17:30:09)

Jai Ganesh · 2007-12-24 01:04:03

#438. If the same number is added to the numerator and the denominator of the fraction 3/5, the result is 3/4. Find the number.

#439. Two numbers are such that the ratio between them is 5:7. If 7 is added to each of them, the ratio becomes 3:4. Find the numbers.

#440. The numerator of a rational number is less than its denominator by 3. If the numerator becomes three times and the denominator is increased by 20, the new number becomes 1/8. Find the original number.

Jai Ganesh · 2007-12-24 01:10:36

#441. The ratio of surface areas of two cubes is 1:4. Find the ratio of their volumes.

#442. The volume of a cube is 512 m³. It is to be painted. If the cost of painting is $5 per m³, find the amount spent on painting the cube.

#443. A class room is 8m long, 7m broad and 4m high. Doors and windows occupy an area of 22m². Find the cost of painting the walls at the rate of $12 per meter square.

Last edited by Jai Ganesh (2007-12-24 17:33:07)

Jai Ganesh · 2007-12-24 02:31:29

#444. The length of a chord of circle at a distance of 5 cm from the center is 24 cm. The diameter of the circle is _________________ cm.

#445. Two complementary angles are such that two times the measure of one is equal to three times the measure of the other. WEhat is the measure of the larger angle?

#446. The ratios of the areas of a square of side 6 cm and an equilateral triangle of side 6 cm is ___________________.

#447. The largest possible square is inscribed in a circle of circumference 2pi units. What is the area of the square in square units?

#448. A square S encloses another square s in such a manner that each corner of s is at the midpoint of the side of S. If If A is the area of S and a is the area of s, then
(a)A=a
(b)a=2A
(c)A=2a
(d)A=4a

JohnnyReinB · 2007-12-24 02:58:15

Merry Christmas Ganesh!

Jai Ganesh · 2007-12-24 03:02:34

All correct, JohnnyReinB!!!
Very well done!!!!!
Try the rest of the problems when you find the time.
Merry X'mas to you too, JohnnyReinB!!!

Jai Ganesh · 2007-12-24 03:24:03

#449. What is the value of

?

#450. In an election, a total of 500,000 voters participated. A candidate got 255,000 votes which was 60% of the total valid votes. What was the percentage of invalid votes?

#451. A train started from a station with a certain number of passengers. At the first halt, half of the passengers alighted and 120 passengers got in. At the second halt, half of the passengers alighted and then the train left for its destination with 360 passengers. How many passengers were there in the train when it started from the first station?

Math Is Fun Forum

#426 2007-12-22 18:16:03

Re: 10 second questions

#427 2007-12-22 18:20:05

Re: 10 second questions

#428 2007-12-22 18:37:34

Re: 10 second questions

#429 2007-12-22 18:48:55

Re: 10 second questions

#430 2007-12-22 18:52:01

Re: 10 second questions

#431 2007-12-22 18:54:24

Re: 10 second questions

#432 2007-12-22 18:59:33

Re: 10 second questions

#433 2007-12-22 19:04:16

Re: 10 second questions

#434 2007-12-22 19:07:12

Re: 10 second questions

#435 2007-12-22 19:11:49

Re: 10 second questions

#436 2007-12-22 19:29:15

Re: 10 second questions

#437 2007-12-22 21:12:12

Re: 10 second questions

#438 2007-12-22 22:09:04

Re: 10 second questions

#439 2007-12-23 17:31:04

Re: 10 second questions

#440 2007-12-23 20:19:24

Re: 10 second questions

#441 2007-12-23 22:48:55

Re: 10 second questions

#442 2007-12-23 22:57:54

Re: 10 second questions

#443 2007-12-23 23:04:49

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#444 2007-12-24 00:55:26

Re: 10 second questions

#445 2007-12-24 01:04:03

Re: 10 second questions

#446 2007-12-24 01:10:36

Re: 10 second questions

#447 2007-12-24 02:31:29

Re: 10 second questions

#448 2007-12-24 02:58:15

Re: 10 second questions

#449 2007-12-24 03:02:34

Re: 10 second questions

#450 2007-12-24 03:24:03

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